verify_digest(){	# $0 method file string
  case "$1" in
  *)
    DIGEST=`echo "$1" | tr a-z A-Z`
    [ "$DIGEST($2)= $3" = "`openssl $1 $2`" ]
    ;;
  esac
}
verify_signature(){	# $0 url|id ... sig
  while [ "$1" != "" ]; do
    case "$1" in
    0x*)
      gpg --recv-keys "$1" || return $?
      ;;
    http:*|ftp:*)
      curl "$1" | gpg --import || return $?
      ;;
    *)
      gpg --verify "$1"
      return $?
    esac
    shift
  done
}
error_out(){	# $0 message ...
  echo "$@" 1>&2
  exit 1
}

curl -ROL -C - http://downloads.sourceforge.net/project/clamav/clamav/0.96.1/clamav-0.96.1.tar.gz
curl -ROL -C - http://downloads.sourceforge.net/project/clamav/clamav/0.96.1/clamav-0.96.1.tar.gz.sig
verify_signature http://www.clamav.net/gpg/tkojm.gpg clamav-0.96.1.tar.gz.sig || error_out "$0: stopped at line $LINENO"

tar xvzf clamav-0.96.1.tar.gz
(cd clamav-0.96.1 && patch -p0 -b -z.org < ../clamav-0.96.1-sakuya.patch)